Drinking water quality in Mathieu
PFAS in drinking water
The total of 20 PFAS ("forever chemicals") was last measured at <SEUIL µg/L. The EU limit is 0.1 µg/L, so this water is at 0 % of the limit. (24 June 2026)
The four most harmful PFAS add up to 0 µg/L, below the health limit of 0.004 µg/L used in Sweden since 2026.
Substances too small to measure count as 0, so the real total may be higher.
20 PFAS (see each substance)
| Acide perfluoroheptane sulfonique (PFHpS) | <0,0010 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,0010 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,0010 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,0010 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,0010 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,0010 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,0010 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,001 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,0010 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,001 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,0020 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,002 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,0010 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,0010 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,0010 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,0010 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,0010 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,0010 µg/L |
Water report for Mathieu
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Official assessment
The latest official test failed at least one quality requirement.
„Les teneurs en chloridazone desphényl, chloridazone méthyl desphényl et chlorothalonil R417888 (produit de dégradation de pesticides) restent inférieures aux valeurs limites fixées dans l'arrêté préfectoral de dérogation à la limite de qualité. La valeur indicative définie pour le chlorothalonil R471811 n’est pas satisfaite. Un progr amme d'amélioration de la qualité des eaux porté par la collectivité est en cours, avec un suivi régulier de ces teneurs. Il convient de noter le caractère incrustant de l’eau (équilibre calco-carbonique inférieur à la référence de qualité). Les autres paramètres sont conformes.“
Values to watch
These values are at least halfway to their legal limit, or over it.
| Parameter | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 42.8 mg/L | ≤ 50 mg/L | within limit |
| Lead | 6.7 µg/L | ≤ 10 µg/L | within limit |
Show all 20 official measurements
| Parameter | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 42.8 mg/L | ≤ 50 mg/L | within limit |
| Nitrite | <0,010 mg/L | ≤ 0.5 mg/L | within limit |
| Lead | 6.7 µg/L | ≤ 10 µg/L | within limit |
| Copper | 0.22 mg(Cu)/L | ≤ 2 mg(Cu)/L | within limit |
| Nickel | 7.8 µg/L | ≤ 20 µg/L | within limit |
| Arsenic | <0,25 µg/L | ≤ 10 µg/L | within limit |
| Cadmium | <0,025 µg/L | ≤ 5 µg/L | within limit |
| Chromium | <0,50 µg/L | ≤ 50 µg/L | within limit |
| Fluoride | 0.12 mg/L | ≤ 1.5 mg/L | within limit |
| Escherichia coli | <1 n/(100mL) | ≤ 0 mL) | within limit |
| Enterococci | <1 n/(100mL) | ≤ 0 mL) | within limit |
| Coliform bacteria | <1 n/(100mL) | ≤ 0 mL) | within limit |
| pH | 7.06 unité pH | 6.5–9.5 pH | within limit |
| Water hardness | 36.6 °f | no limit | informational |
| Electrical conductivity | 816 µS/cm | 200–1,100 µS/cm | within limit |
| Chloride | 42.5 mg/L | ≤ 250 mg/L | within limit |
| Sulphate | 41 mg/L | ≤ 250 mg/L | within limit |
| Sodium | 18.6 mg/L | ≤ 200 mg/L | within limit |
| Iron | <1,0 µg/L | ≤ 200 µg/L | within limit |
| Turbidity | <0,10 NFU | ≤ 2 NFU | within limit |
Frequently asked questions
Is tap water in Mathieu safe to drink?
The latest official test failed at least one quality requirement.
How high are PFAS levels in Mathieu's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at <SEUIL µg/L. The EU limit is 0.1 µg/L, so this water is at 0 % of the limit. (below the EU limit)
Does the water in Mathieu also meet the strictest limits in Europe?
Yes. Even against Europe's strictest limit, the health limit of 0.004 µg/L used in Sweden since 2026, the measured value of 0 µg/L stays below.
How hard is the water in Mathieu?
The water hardness in Mathieu is 36.6 °f (hard). This mainly matters for household appliances and detergent dosing, not for health.
Where does this data come from?
All values come from official publications: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM). Retrieved on 28 August 2026.
Data source
- Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM)
- https://hubeau.eaufrance.fr/api/v1/qualite_eau_potable/resultats_dis?code_commune=14407
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 28 August 2026
- Supply networks
- ANGUERNY
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.